以黄淮麦区优良品种矮抗58、周麦18、豫麦49、百农418为研究对象,采用田间试验与实验室分析相结合的方法,对不同小麦品种在不同生育时期的抗倒伏性状进行研究.结果表明:茎秆机械强度在开花期至花后20 d处于较高水平,在花后30 d明显下降;倒伏指数在开花期最小,花后30 d最大,其余两个时期处于中间水平.相关分析表明,开花期机械强度与重心高度呈显著负相关,与纤维素、木质素含量呈显著正相关,倒伏指数与节长、株高、重心高度呈显著正相关,与纤维素、木质素含量呈显著负相关;花后10 d和花后20 d机械强度与节长、株高、重心高度呈显著负相关,与茎粗、纤维素、半纤维素、木质素含量呈显著正相关,倒伏指数这段时期正好与之相反;花后30 d机械强度与株高、重心高度呈显著负相关,倒伏指数与株高、重心高度呈显著正相关,与木质素含量呈显著负相关.因此,明确各个生育时期与抗倒性相关的茎秆特性,可为黄淮麦区高产抗倒性品种的选育提供依据. In order to study the anti-lodging traits of different wheat cultivars at different growth stages based on the combination of field experiments and laboratory analysis, the cultivars A6, ZM18, Yumai49 and BaiNong418, The results showed that the mechanical strength of the stalk was high at the flowering stage and reached its peak at 20 days after anthesis, and significantly decreased at 30 days after anthesis. The lodging index was the lowest at flowering stage and the maximum at 30 days after anthesis, The correlation analysis showed that there was a significant negative correlation between the mechanical strength at flowering stage and the height of the center of gravity and positively correlated with the content of cellulose and lignin.The lodging index was significantly and positively correlated with the length of the plant, Lignin content was significantly negatively correlated; mechanical strength and flower length, plant height, center of gravity was significantly negatively correlated at 10 d after anthesis and after anthesis 20 d after anthesis, but with stem diameter, cellulose, hemicellulose, lignin content was significantly positive The lodging index was opposite to that in the period. The mechanical strength was negatively correlated with plant height and center of gravity at 30 days after flowering. The lodging index was significantly and positively correlated with plant height and center of gravity, and negatively correlated with lignin content .because Clearly stem lodging resistance characteristics associated with various growth stages, can provide the basis for breeding high-yielding varieties of lodging Huanghuai cultivation area.